Power your 12V electrical system with the Victron Orion-Tr Smart 24/12-20A (240W) Isolated DC-DC Charger — a compact, intelligent DC-DC charger and constant-voltage power supply. It delivers a wide input and output voltage range to keep your service battery charged while protecting the starter battery, even with long cable runs or voltage drops from Euro 5/6 smart alternators.
Smart, configurable charging for any mobile installation
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Bluetooth Smart Enabled — monitor, adjust settings, and update the charger from any Bluetooth-enabled device.
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Instant Readout — VictronConnect shows key data, warnings, and alarms on the device list page without needing a direct connection.
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Fully programmable charging — choose a configurable battery charge algorithm or fixed output to match your battery chemistry and usage.
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Adaptive 3-Stage Charge Algorithm — for lead-acid: Bulk, Absorption, Float with optimized absorption times to prevent overcharging during shallow discharges and ensure complete recharge after deep cycles. For lithium: fixed absorption time (default 2 hours) or switch to fixed output as needed.
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Engine and alternator compatibility — designed for use with Smart Alternators (Euro 5/6 engines) and includes an engine running detection to prevent starter battery discharge.
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Remote On/Off — connect a two-pole remote switch or relay; flexible control via the H (battery +) or L (battery −) terminals.
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Parallel capable — all models can be paralleled to increase total output without limits on the number of units.
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Protection and reliability — short-circuit protected, high-temperature protection (output current reduces at high ambient temperatures), and IP43-rated when installed with downward-facing screw terminals.
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Versatile installation — screw terminals require no special tools; includes an input fuse (non-replaceable) for safety and reliability.
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Flexible usage — operates as both a DC-DC charger and a dependable constant-voltage power supply for critical loads.
Designed for demanding mobile environments
This Orion-Tr Smart unit is ideal for boats, RVs, caravans, and other mobile setups where maintaining battery health is essential. Its isolation design protects the starter battery from discharge while ensuring the auxiliary battery receives precise, controlled charging under varying electrical conditions.
Technical specifications
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Input Voltage Range: 16–35 V
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Under Voltage Shut Down: 14 V
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Under Voltage Restart: 15 V
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Nominal Output Voltage: 12.2 V
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Output Voltage Adjust Range: 10–15 V
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Output Voltage Tolerance: ±0.2 V
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Output Noise: 2 mV rms
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Continuous Output Current at Nominal Output Voltage and 40°C: 20 A
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Maximum Output Current: 20 A
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Input Fuse: non-replaceable
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Protection: High temperature protection; IP43 rated (downward-oriented screw terminals)
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Paralleling: Unlimited units can be connected in parallel
